Can you find this Delphi coding error (part 9)?
Can you spot the error in the following Delphi code extract? Actually it is not in "real code" but more in declarations.. This is the only hint you get..
..
type
IDynArray<T> = interface
['{67DE635F-0443-40A8-942B-2B42540871AC}']
procedure Add(P : Pointer);
procedure AddUnique(P : Pointer);
..
end;
..
This was quite easy, right?
Solution: A generic interface should not have a GUID. All types created from this interface will then share the same GUID, which will cause type casting to malfunction.
The good news is that with Pascal Analyzer, our popular static code analyzer product, these situations can be detected automatically. There is a section STWA9 in the Strong Warnings Report. It is called "Generic interface has GUID".
Not so hard to spot! But imagine finding this problem among thousands of lines of code spread over hundreds of units! And consider also a code base that is evolving all the time, so the code must constantly be rechecked.
Pascal Analyzer has a total of 53 reports. Those are divided into over 230 sections, all providing statistics, references, errors and warnings for your code. Pascal Analyzer can be run as a standalone Windows application, or as a command-line program. The second choice is suitable if you want to integrate static code analysis with your build process.
Or use Pascal Expert, our RAD Studio plugin, to find the problems immediately while coding. Pascal Expert contains much of the same capabilities like Pascal Analyzer, and is obtainable with a discount when buying both products.
See our orders page for more details or get free evaluations from the download page.
Can you see the Delphi coding problem? (Part 8) Can you see the Delphi coding error? (Part 7) Can you see the Delphi coding error? (Part 6) Can you see the Delphi coding error? (Part 5) Can you see the Delphi coding error? (Part 4) Can you see the Delphi coding error? (Part 3) Can you see the Delphi coding error? (Part 2) Can you see the Delphi coding error? (Part 1)